Improved furnace for treating slag



J. HORNIG. FURNACE FOR TREATING SLAG.

No. 42,947. Patented May 31. 1864.

UNITED STATES PATENT OFFICE.

JULIUS 1101mm, or TROY, new YORK.

IMPROVED FURNACE FOR TREATING SLAG.

Specification forming part of Letters Patent No. 42,9 1 7,. dated May 31, 1864.

To all whom it may concern:

Be it known that l, JULIUS Homne, of Troy,

in the county of Rensselaer and State of New I ingdraw-ings, making a part of this specifi;

cation, in which- Figurelis aside view of m'yinvention, Fig. 2, a longitudinal vertical section of the same, taken in the line a: m, Fig. 3; 'Fig. 3, a transverse vertical section of the same, taken in the liney y, Fig. 2.

'Similar letters 'o f r'eferenc indicate like parts.

This invention relates to anew and improved furnace for separating the more fusible from the less fusible portion of slag, the former being used as flux ,in the melting ofairon, and

the latter used as a lining for puddling-furnaces to protect the metal lining. At present the slag is fused in an ordinary furnace, the more fusible portion as it lique'fies descending by its own gravity through the mass and passing out at the bottom, and when the charge in the furnace has been subjected to a requisite degree of heat a sufficient length of time to separate the more fusible from the less fusible portion, the fires are extinguished and the less fusible portionremoved, when the furnace is again charged, the fires kindled, and the 'op- .eration repeated. This mode or way is attended with a considerable loss of time-an objection which my invention completely obviates, as with the latter the operation is rendered continuous, the'fusing and separating processes being performed simultaneously and the furnacechargcd from timeto time, as required under constant fires, the latter not being-requiredto be-extinguished in any case,

excepting only when the furnace requires to to be repaired.

A represents the upright main portion of the furnace, constructed of masonry, as usual, but provided with an inclined bottom, a, at the lower end of which there is a throat, b,

the latter communicatingwith a chamber, B,

the bottom 0 of which is slightly inclined down toward the throat b, as shown in Fig. 2. The angle or gutter (1, formed by the junction of the bottoms a and c, inclines downward from its center each way, as shown in Fig. 3, and an opening, 0, is made in each side of the furnace in line with said gutter, as also shown in Fig. .3. i

At each side of the lower part, A, of the furnace there are two fire-grates, O G, and a fire-grate, D, is at each sideof the part B, below which and beyond the bottom cthere is a pit, E, the use of which will be presently de-,- scribed, and at each side of the furnace above the openings 6 there is an opening, F, covered by a door, f, and there is an opening, G, covered by a door, at each side of the part B of the furnace. The end of the chamber or part B of the furnace-'that is to say, ithepit' E -is provided with a door, H, of sufficient dimensions, if necessary, to admit, whenraised or opened, of a cart being backed therein.

The operation is as follows: Thebody or main portion A of the furnace ischarged with slag, and fires kindled in the grates O C D D.

The throat I) may at first havelarge pieces of slag adjusted in it to prevent the slag from A enteringB. At a certain degree of heat the more fusibleportions of the slag will melt. and pass down the inclinedbottom a into the gutter d and be dischargedthrough the openings 6 e.. The attendants, bymeans of bars or other suitable tools passed through the openings]? G, work or pass the less fusible portions. of

the slag along upon the inclined bottom 0,

where it is subjected to a heat from the fires in the grates D D and all the more fusible matter liquefied. The less fusible portion is from time to time thrown off from the bottom 0 into the pitE, or into a cart backed therein to receive it, "and the main part A of the furnace is replenished with" slag from time to time, as occasion requires. Thus it will be seen that the operation or process is a continuous one, no time being lostin .extinguish-' ing fires and waiting for the furnace to coolin order to remove the less fusible portion ofthe slag. By my improvement also the two portions are thoroughly separated, owing to the additional roasting of the slag on the bottom I c in comparatively small masses.

Having thus described my invention, what I claim as new, 1nd desire to secure by Letters .innnipuhrting 6f the slag and the discharge of Patent, is+ the'more and les'sfusible portions of thesame,

The main portion A of the furnace, in mflubstmitially as set forth. bination with the chamber 1 provided, -1'e- JULIUSHORNIG. speetively, with theinelined bottoms a c and H \Vitnesses: v gutter d; in conpection with suitable open- GEO. A. STONE,

ings in the sides of the furiiace to admit of the CHAS. L. FULLER. 

